نتایج جستجو برای: فاز sks

تعداد نتایج: 16139  

ژورنال: :فیزیک زمین و فضا 2013
فاطمه روستائی علی غلامی احمد سدید خوی

در این مقاله یک الگوریتم واهمامیخت کور با استفاده از روش منظم سازی تغییر کلی (tv)، به­منظور خوانش بسیاردقیق­تر زمان رسید نسبی فازهای متفاوت امواج زلزله  به کار گرفته شده است. در این روش اثر چشمه و تضعیف به­صورت تابعی گاوسی در نظر گرفته شده و همراه با زمان رسید فازهای متفاوت برآورد می­شود. به جای روش نرم-1 مرسوم برای tv در مقاله از تابع پتانسیل تنک کننده­تر ، برای واضح­تر کردن زمان رسید فازها اس...

ژورنال: ژئوفیزیک ایران 1387
احمد سدیدخوی, حمیدرضا سیاه‌کوهی غلام جوان دولویی,

فاز SKS به‌صورت موج S از گوشته عبور می‌کند، در مرز هسته- گوشته به موج P تبدیل می‌شود، هسته خارجی را به‌صورت موج P طی می‌کند و سپس در برگشت به گوشته به موج S تبدیل می‌شود. اگر این فاز موج برشی از محیط ناهمسانگرد گوشته و پوسته زمین عبور کند، به دو مؤلفه موج برشی عمودبرهم، یکی سریع و دیگری کند قطبیده می‌شود. استفاده از فرایند جدایش موج برشی در محاسبه راستا و اندازه ناهمسانگردی مسیر انتشار موج، روش...

2014
Kouyou Akiyama Kentaro Katayama Takehito Tsuji Tetsuo Kunieda

The development of the axial skeleton is a complex process, consisting of segmentation and differentiation of somites and ossification of the vertebrae. The autosomal recessive skeletal fusion with sterility (sks) mutation of the mouse causes skeletal malformations due to fusion of the vertebrae and ribs, but the underlying defects of vertebral formation during embryonic development have not ye...

2009
Yang Zhang Jeroen Ritsema Michael S. Thorne

[1] Between 105–115 degrees, the SKS waveform is complicated by the formation of SPdKS, a wave that has segments of P diffraction along the core mantle boundary. While previous studies have primarily focused on the moveout of SPdKS from SKS, we analyze the concomitant reduction of the SKS amplitude. Long-period SKKS/SKS amplitude ratios present a coherent global pattern. SKKS/ SKS is relatively...

Journal: :Archives of dermatology 2000
D Gill A Dorevitch R Marks

BACKGROUND Seborrheic keratoses (SKs) are common skin lesions that have been shown to occur with increasing age, although the age of onset is not well recorded. OBJECTIVE To determine the prevalence, nature, and distribution of SKs in young people. METHODS One hundred seventy people aged 15 to 30 years were given a total body examination during which the presence, number, site, and size of ...

2005
Paola Bruscoli François Lamarche Pietro Di Gianantonio Fabio Alessi Denis Bechet Kai Brünnler Agata Ciabattoni Paolo Coppola Stéphane Lengrand Sara Negri Sylvain Pogodalla Ivan Scagnetto Lutz Straßburger

This paper shows how derivations in (a variation of) SKS can be translated into proof nets. Since an SKS derivation contains more information about a proof than the corresponding proof net, we observe a loss of information which can be understood as “eliminating bureaucracy”. Technically this is achieved by cut reduction on proof nets. As an intermediate step between the two extremes, SKS deriv...

2017
Hasnaa Zaouri Baderddine Hassam

Seborrhoeic keratoses (SKs) are common benign epithelial tumors. They preferentially arise on seborrheic skin areas such as the face and the trunk, rarely on the genital area. We report the case of a 41-year old patient with no particular past medical history presenting with pubic lesions evolving for three years. Clinical examination showed blackish keratosis lesions having a cerebriform appea...

Journal: :J. Log. Comput. 2011
Lutz Straßburger

This paper shows how derivations in the deep inference system SKS for classical propositional logic can be translated into proof nets. Since an SKS derivation contains more information about a proof than the corresponding proof net, we observe a loss of information which can be understood as “eliminating bureaucracy”. Technically this is achieved by cut reduction on proof nets. As an intermedia...

2005
Paola Bruscoli François Lamarche Pietro Di Gianantonio Fabio Alessi Denis Bechet Kai Brünnler Agata Ciabattoni Paolo Coppola Stéphane Lengrand Sara Negri Sylvain Pogodalla Ivan Scagnetto Lutz Straßburger

This paper shows how derivations in (a variation of) SKS can be translated into proof nets. Since an SKS derivation contains more information about a proof than the corresponding proof net, we observe a loss of information which can be understood as “eliminating bureaucracy”. Technically this is achieved by cut reduction on proof nets. As an intermediate step between the two extremes, SKS deriv...

2005
Lutz Straßburger

This paper shows how derivations in (a variation of) SKS can be translated into proof nets. Since an SKS derivation contains more information about a proof than the corresponding proof net, we observe a loss of information which can be understood as “eliminating bureaucracy”. Technically this is achieved by cut reduction on proof nets. As an intermediate step between the two extremes, SKS deriv...

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